Fire-extinguishing device for a vehicle battery

A fire-extinguishing device for a vehicle battery, comprising:

• a gas discharge part installed in a battery pack and configured to discharge gas inside the battery pack;
• a gas path part configured to permit flow of gas generated in the battery pack and discharged through the gas discharge part in an event of a fire;
• a catalytic converter installed in the gas path part and configured to convert carbon monoxide in gas flowing through the gas path part into carbon dioxide;
• a fire-extinguishing agent tank configured to store a fire-extinguishing agent and to be connected to the gas path part, the fire-extinguishing agent tank allowing the carbon dioxide converted by the catalytic converter to flow thereinto;
• and
• a fire-extinguishing agent supply path part connecting the fire-extinguishing agent tank to the battery pack,
• wherein gas flowing into the fire-extinguishing agent tank and the fire-extinguishing agent stored therein are supplied from the fire-extinguishing agent tank to the battery pack through the fire-extinguishing agent supply path part by pressure in the fire-extinguishing agent tank to extinguish the fire, and
• wherein the pressure in the fire-extinguishing agent tank rises while the gas passing through the catalytic converter flows into the fire-extinguishing agent tank.